Sister Rosetta Tharpe was a musical innovator in the 1930s and ’40s, performing at churches by day and the world-famous Cotton Club by night. Her work influenced such musicians as Elvis Presley, Chuck Berry and Johnny Cash, and she established a style of recording that combined the spirituality of gospel music with rhythmic accompaniment that garnered her the nickname “the godmother of rock and roll.” This play with music recounts the years in which she toured with and mentored a young artist named Marie Knight—they recorded the gospel hits “Up Above My Head” and “Gospel Train.”